\\n\", argv[0]);\nreturn 0;\n} \n /* 課題番号 */\nkadai = argv[3][0] - '0'; /* 1 文字目を数値化　*/\n /* カラー画像のファイルを白黒化して読み込み */\nsrc = read_ppm(argv[1], &width, &height);\nif(kadai == 1){ /* 白黒化した入力画像の保存 */\nsave_pgm(argv[2], src, width, height);\nfree(src);\nreturn 0;\n}\n\n/* 出力画像バッファの作成 */\nout = (unsigned char *)malloc(width * height);\nswitch(kadai){\ncase 2: /* 濃度変換：白黒反転 */\nfor(f = 0; f <= 255; f++){\ng[f] = 255 - f; /* ルックアップテーブル */\n}\n/* 濃度変換関数を用いた変換 */\ntrans(src, out, width, height, g);\nbreak;\ncase 3: /* 濃度変換：図 1 */\nfor(f = 0; f < f_L; f++){\ng[f] = 0; /* ルックアップテーブル */\n}\nfor(f = f_L; f < f_H; f++){\ng[f] = (int)(255.0 / (f_H - f_L) * (f - f_L) + 0.5); /* ルックアップテーブル */\n}\nfor(f = f_H; f <= 255; f++){\ng[f] = 255; /* ルックアップテーブル */\n}\n/* 濃度変換関数を用いた変換 */\ntrans(src, out, width, height, g);\nbreak;\ncase 4: /* 濃度変換：ガンマ変換 */\nfor(f = 0; f <= 255; f++){\ng[f] = (int)(255.0*pow(f / 255.0, 1.0 / gamma) + 0.5); /* ルックアップテーブル */\n}\n/* 濃度変換関数を用いた変換 */\ntrans(src, out, width, height, g);\nbreak;\ncase 5: /* エッジ検出：図 2(a) */\nedge5(src, out, width, height, 50);\nbreak;\ncase 6: /* エッジ検出：図 2(b) */\nedge6(src, out, width, height, 50);\nbreak;\ncase 7: /* エッジ検出： sobel */\nedge7(src, out, width, height, threshold,50);\nbreak;\ncase 8: /* エッジ検出：ラプラシアン */\nedge8(src, out, width, height, 50);\nbreak;\ndefault:\nfprintf(stderr, \"正しい課題番号を指定してください!\\n\");\nfree(src);\nfree(out);\nreturn -1;\n}\n/* 出力画像の保存 */\nsave_pgm(argv[2], out, width, height);\nfree(src);\nfree(out);\nreturn 0;\n}\nvoid trans(unsigned char *src, unsigned char *out, int width, int height, int g[])\n{\nint x, y, i;\nfor(y = 0; y < height; y++){\nfor(x = 0; x < width; x++){\ni = width * y + x;\nout[i] = g[src[i]];\n}\n}\nreturn;\n}\nvoid edge5(unsigned char *src, unsigned char *out, int width, int height, int threshold)\n{\nint x, y, i, val;\nint op[9] = {-1, 0, 1, -2, 0, 2, -1, 0, 1};\n/* 上下左右の縁 */\nfor(x = 0; x < width; x++){\nout[x] = 0; /* 上端 */\nout[width*(height-1) + x] = 0; /* 下端 */\n}\nfor(y = 1; y < height-1; y++){\nout[width * y] = 0; /* 左端 */\nout[width * y + width-1] = 0; /* 右端 */\n}\n/* 内側の処理 */\nfor(y = 1; y < height-1; y++){\nfor(x = 1; x < width-1; x++){\ni = width * y + x;\nval = op[0] * src[i - width -1] + op[1] * src[i - width] + op[2] * src[i - width + 1] +\nop[3] * src[i -1] + op[4] * src[i ] + op[5] * src[i + 1] +\nop[6] * src[i + width -1] + op[7] * src[i + width] + op[8] * src[i + width + 1];\n/* 2 値化 */\nif(val >= threshold)\nout[i] = 255;\nelse\nout[i] = 0;\n}\n}\nreturn;\n}\nvoid edge6(unsigned char *src, unsigned char *out, int width, int height, int threshold)\n{\nint x, y, i, val;\nint op[9] = {-1, -2, -1, 0, 0, 0, 1, 2, 1};\n/* 上下左右の縁 */\nfor(x = 0; x < width; x++){\nout[x] = 0; /* 上端 */\nout[width*(height-1) + x] = 0; /* 下端 */\n}\nfor(y = 1; y < height-1; y++){\nout[width * y] = 0; /* 左端 */\nout[width * y + width-1] = 0; /* 右端 */\n}\n/* 内側の処理 */\nfor(y = 1; y < height-1; y++){\nfor(x = 1; x < width-1; x++){\ni = width * y + x;\nval = op[0] * src[i - width -1] + op[1] * src[i - width] + op[2] * src[i - width + 1] +\nop[3] * src[i -1] + op[4] * src[i ] + op[5] * src[i + 1] +\nop[6] * src[i + width -1] + op[7] * src[i + width] + op[8] * src[i + width + 1];\n/* 2 値化 */\nif(val >= threshold)\nout[i] = 255;\nelse\nout[i] = 0;\n}\n}\nreturn;\n}\nvoid edge7(unsigned char *src, unsigned char *out, int width, int height, int threshold, double sqrt) {\n /* 内側の処理 : 端の処理はテキスト C-1.pdf 参照　*/\n int x = 0, y = 0, i = 0;\n double val = 0.0, fx = 0.0, fy = 0.0;\n double fxa[9] = { -1.0,0.0,1.0,-2.0,0.0,2.0,-1.0,0.0,1.0 };\n double fyb[9] = { -1.0,0.0,1.0,-2.0,0.0,2.0,-1.0,0.0,1.0 };\n /* 上下左右の縁 */\n for (x = 0; x < width; x++) {\n out[x] = 0; /* 上端 */\n out[width*(height - 1) + x] = 0; /* 下端 */\n }\n for (y = 1; y < height - 1; y++) {\n out[width * y] = 0; /* 左端 */\n out[width * y + width - 1] = 0; /* 右端 */\n }\n for (y = 1; y < height - 1; y++) {\n for (x = 1; x < width - 1; x++) {\n i = width * y + x; /* 1 次元で見た注目画素の位置 */\n fx = fxa[0] * src[i - width - 1] + fxa[1] * src[i - width] + fxa[2] * src[i - width + 1] + fxa[3] * src[i - 1] + fxa[4] * src[i] + fxa[5] * src[i + 1] +\n fxa[6] * src[i + width - 1] + fxa[7] * src[i + width] + fxa[8] * src[i + width + 1];\n fy = fyb[0] * src[i - width - 1] + fyb[1] * src[i - width] + fyb[2] * src[i - width + 1] + fyb[3] * src[i - 1] + fyb[4] * src[i] + fyb[5] * src[i + 1] +\n fyb[6] * src[i + width - 1] + fyb[7] * src[i + width] + fyb[8] * src[i + width + 1];\n double val = sqrt*(fx * fx + fy * fy)+0.5;\n if (val > threshold) {\n out[i] = 255;\n }\n else {\n out[i] = 0;\n }\n }\n }\n}\nvoid edge8(unsigned char *src, unsigned char *out, int width, int height, int threshold){\n/* 内側の処理 : 端の処理はテキスト C-1.pdf 参照　*/\n int x = 0,y = 0,i = 0;\n double val = 0.0;\n double op[9]={1.0,1.0,1.0,1.0,-8.0,1.0,1.0,1.0,1.0};\n/* 上下左右の縁 */\n for(x = 0; x < width; x++){\n out[x] = 0; /* 上端 */\n out[width*(height-1) + x] = 0; /* 下端 */\n }\n for(y = 1; y < height-1; y++){\n out[width * y] = 0; /* 左端 */\n out[width * y + width-1] = 0; /* 右端 */\n }\n for(y = 1; y < height-1; y++){\n for(x = 1; x < width-1; x++){\n i = width * y + x; /* 1 次元で見た注目画素の位置 */\n val = op[0] * src[i-width-1] + op[1] * src[i-width] + op[2]* src[i-width+1] + op[3] * src[i-1] + op[4] * src[i] + op[5] * src[i+1]+op[6] * src[i+width-1] + op[7] * src[i+width] + op[8] * src[i+width+1]; /* 絶対値をとる */\n if(val < 0)\n val = -val; /* 符号反転 */\n if(val > threshold){\n out[i]= 255;\n }\n else\n {\n out[i]= 0;\n }\n }\n }\n}\nunsigned char *read_ppm(char *fname, int *width, int *height)\n{\n char str[256], c;\n int max = 0;\n unsigned char *gray = NULL;\n int r = 0, g = 0, b = 0;\n int size = 0;\n int i;\n FILE *fp = fopen(fname, \"rb\");\n if (fp == NULL) {\n fprintf(stderr, \"error: %s cannot open!\", fname);\n exit(-1);\n }\n /* ------------ Magic number ---------- */\n fscanf(fp, \"%s\", str);\n c = str[1];\n if (c == '3' || c == '6') {\n /* ------------ comment, space, or size ---------- */\n fscanf(fp, \"%s\", str);\n if (str[0] == '#' || str[0] == ' ') {\n while (fscanf(fp, \"%c\", &str[0])) { /* comment skip */\n if (str[0] == '\\n')\n break;\n }\n fscanf(fp, \"%d %d\", width, height);\n }\n else {\n sscanf(str, \"%d\", width);\n fscanf(fp, \"%d\", height);\n }\n /* ------------ comment, space, or max value ---------- */\n fscanf(fp, \"%d\", &max);\n /* ------------ memory create ---------- */\n size = (*width) * (*height);\n gray = (unsigned char *)malloc(size);\n /* ------------ pixel value ---------- */\n if (c == '3') { /* テキストデータ */\n for (i = 0; i < size; i++) {\n fscanf(fp, \"%d %d %d\", &r, &g, &b);\n gray[i] = (unsigned char)(0.299 * r + 0.587 * g + 0.114 * b + 0.5);\n }\n\n }\n else { /* バイナリデータ */\n fread(&r, 1, 1, fp); /* LF */\n for (i = 0; i < size; i++) {\n fread(&r, 1, 1, fp);\n fread(&g, 1, 1, fp);\n fread(&b, 1, 1, fp);\n gray[i] = (unsigned char)(0.299 * r + 0.587 * g + 0.114 * b + 0.5);\n }\n }\n }\n else\n fprintf(stderr, \"[%s] is not a ppm-file!\\n\", fname);\n fclose(fp);\n return gray;\n}\nvoid save_pgm(char *fname, unsigned char *gray, int width, int height)\n{\n int x, y;\n FILE *fp = fopen(fname, \"w\");\n fprintf(fp, \"P2\\n\");\n fprintf(fp, \"%d %d\\n\", width, height);\n fprintf(fp, \"255\\n\");\n for (y = 0; y < height; y++) {\n for (x = 0; x < width; x++)\n fprintf(fp, \"%d \", gray[width * y + x]); /* (注) %d の後にスペースあり */\n fprintf(fp, \"\\n\");\n }\n fclose(fp);\n return;\n}","codes",[],"stdin","compiler","gcc-9.1.0-c","warning,gnu11,cpp-no-pedantic","-lm","createdAt",1557352307,"title","description","isPrivate","compilerInfo",{"_11":3387,"_13":3397,"_15":16,"_17":98,"_19":3398,"_22":23,"_24":25,"_26":27,"_28":3399},"9.1.0",[21],[3400,3402,3404,3406,3416],{"_31":32,"_33":3401},{"_11":35,"_36":23,"_37":38,"_17":39},{"_31":32,"_33":3403},{"_11":42,"_36":25,"_37":43,"_17":44},{"_31":32,"_33":3405},{"_11":47,"_36":25,"_37":48,"_17":49},{"_31":51,"_33":3407},{"_11":53,"_36":54,"_55":3408},[3409,3410,3411,3412,3413,3414,3415],{"_11":58,"_37":14,"_17":59},{"_11":61,"_37":62,"_17":63},{"_11":65,"_37":66,"_17":67},{"_11":69,"_37":70,"_17":71},{"_11":73,"_37":74,"_17":75},{"_11":77,"_37":78,"_17":79},{"_11":54,"_37":81,"_17":82},{"_31":51,"_33":3417},{"_11":85,"_36":86,"_55":3418},[3419,3420,3421],{"_11":86,"_37":14,"_17":89},{"_11":85,"_37":91,"_17":91},{"_11":93,"_37":94,"_17":94},"results",[3424,3428,3431,3434,3437],{"_31":3425,"_3426":3427},"Control","data","Start",{"_31":3429,"_3426":3430},"CompilerMessageE","prog.c: In function 'edge7':\nprog.c:164:12: warning: unused variable 'val' [-Wunused-variable]\n 164 | double val = 0.0, fx = 0.0, fy = 0.0;\n | ^~~\n",{"_31":3432,"_3426":3433},"StdOut","usage: ./prog.exe

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Expected objects in C++11 and later in a single-file header-only library","",{"_3450":3581,"_3452":3582},"v0.9.0","2025-06-24T10:27:34Z",{"_3450":3584,"_3452":3585},"v0.8.0","2024-06-05T21:24:45Z",{"_11":3587,"_3443":3588,"_3393":3589,"_3446":3590,"_3448":3591,"_3454":3594},"gsl-lite","gsl-lite/gsl-lite","ISO C++ Core Guidelines Library implementation for C++98, C++11 up","",{"_3450":3592,"_3452":3593},"v1.0.1","2025-05-19T21:18:08Z",{"_3450":3595,"_3452":3596},"v0.42.0","2024-11-01T20:24:11Z",{"_11":3598,"_3443":3599,"_3393":3600,"_3446":3601,"_3448":3602,"_3454":3605},"ut","boost-ext/ut","C++20 μ(micro)/Unit Testing framework","",{"_3450":3603,"_3452":3604},"v2.3.1","2025-04-02T13:02:52Z",{"_3450":3606,"_3452":3607},"v2.3.0","2025-02-04T11:58:39Z","env",{"_3610":3611,"_3612":3613,"_3614":3615,"_3616":3617,"_3618":3619,"_3620":3621,"_3622":3623,"_3624":3625,"_3626":3627},"KV_CACHE",{},"KV_SESSION",{},"R2_BUCKET",{},"WANDBOX_GITHUB_CLIENT_ID","f9d429d939d997e6b08e","WANDBOX_GITHUB_CLIENT_SECRET","d99b3d12225671cde514d9e2b3d5cc8356f4ed5f","WANDBOX_KV_COOKIE_SECRET","FaCnykHoYzqiXReGkgvmcYGvQdQ4yZUE","WANDBOX_R2_PREFIX","master/","WANDBOX_URL_PREFIX","https://api.wandbox.org","ASSETS",{},"root","actionData","errors"]