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View Compilation Error

0_0_29009296_28220.c: In function 'main':
0_0_29009296_28220.c:10:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=1;i<=n;i++){
         ^
0_0_29009296_28220.c:10:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_29009296_28220.c:13:17: error: redefinition of 'i'
         for(int i=1;i<=n;i++){
                 ^
0_0_29009296_28220.c:10:17: note: previous definition of 'i' was here
         for(int i=1;i<=n;i++){
                 ^
0_0_29009296_28220.c:13:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=1;i<=n;i++){
         ^
0_0_29009296_28220.c:16:17: error: redefinition of 'i'
         for(int i=0;i<=1024;i++)
                 ^
0_0_29009296_28220.c:13:17: note: previous definition of 'i' was here
         for(int i=1;i<=n;i++){
                 ^
0_0_29009296_28220.c:16:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=0;i<=1024;i++)
         ^
0_0_29009296_28220.c:18:17: error: redefinition of 'i'
         for(int i=1;i<=n;i++){
                 ^
0_0_29009296_28220.c:16:17: note: previous definition of 'i' was here
         for(int i=0;i<=1024;i++)
                 ^
0_0_29009296_28220.c:18:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=1;i<=n;i++){
         ^
0_0_29009296_28220.c:19:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for(int j=i;j<=n;j++){
             ^
0_0_29009296_28220.c:27:17: error: redefinition of 'i'
         for(int i=0;i<m;i++){
                 ^
0_0_29009296_28220.c:18:17: note: previous definition of 'i' was here
         for(int i=1;i<=n;i++){
                 ^
0_0_29009296_28220.c:27:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=0;i<m;i++){
         ^
0_0_29009296_28220.c:31:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for(int j=x;j>=0;j--){
             ^
0_0_29009296_28220.c:37:21: error: redefinition of 'j'
             for(int j=x;j<=1024;j++){
                     ^
0_0_29009296_28220.c:31:21: note: previous definition of 'j' was here
             for(int j=x;j>=0;j--){
                     ^
0_0_29009296_28220.c:37:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for(int j=x;j<=1024;j++){
             ^


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