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View Compilation Error

0_0_23247730_5779.c: In function 'main':
0_0_23247730_5779.c:20:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for (int j = 0; j < i; j ++) {
             ^
0_0_23247730_5779.c:20:13: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_23247730_5779.c:22:21: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
                     for (int k = 0; k < i; k ++) {
                     ^
0_0_23247730_5779.c:29:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for (int j = 0; j < iMax; j ++)  num[i][j] %= 3;
             ^
0_0_23247730_5779.c:37:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for (int j = iMax - 1; j >= 0 ; j --) {
             ^
0_0_23247730_5779.c:46:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int j = iMax - 1; j >= 0; j --) {
         ^
0_0_23247730_5779.c:50:13: error: redeclaration of 'j' with no linkage
         int j;
             ^
0_0_23247730_5779.c:46:18: note: previous definition of 'j' was here
         for (int j = iMax - 1; j >= 0; j --) {
                  ^
0_0_23247730_5779.c:55:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int k = iMax - 1; k >= 0; k --) {
         ^


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